Determination of electric field distribution inside dielectric bodies mostly requires solving the Laplace's equation. In many cases physical systems are so complex that analytical solutions are difficult or even impossible to obtain, as is mentioned in [1]. Nowadays, using computer, it is possible to exploit simple numerical approximation methods and in a few minutes to solve complex field problems. A widely used method for numerical electrostatic problems solving is the Charge simulation method (CSM), described in [2]. Basic idea of this method is replacing the existing system by fictitious charges (FCs) chosen in certain way and placing them inside the respective system volumes. Unknown quantities are the charges values and their coordinates. The question remains how to form system of equations and to find these values? Several possibilities exist. One of the simplest options is to use the point matching method as shown in this paper. Other options exist, such as least - square method, variation method or boundary conditions method.
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